AC Power Adapter for Canon ACK-E5 includes the adapter and detachable extension cord shown here.

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The Canon ACK-E5 AC Power Adapter provides DC power for many Canon EOS, Elura, and PowerShot camera models. This adapter kit includes both the CA-PS700 AC adapter as well as the DR-E5 coupler which when combined constitute the Canon ACK-E5 adapter model. The DR-E5 coupler fits into your camera in place of the Canon LP-E5 battery and the adapter tip plugs into the coupler to provide power your digital camera. More info at: AC Power Adapters Explained

NOTICE: When using a coupler with your Canon camera, you MUST
close the battery door, or the camera will not turn on. Canon has provided a
small slot on the side of the battery compartment for the cord to fit through,
allowing the camera door to close.